大豆食心虫是东北大豆产区危害最严重的害虫。据调查,大豆虫食粒率一般在15～20%,严重年份达60～70%。它所造成的经济损失,平均占大豆总产值的30%左右。一、发生规律与条件大豆食心虫每年发生一代。以老熟幼虫在土中结茧越冬。第二年7月中、下旬脱茧,上移至表土层结茧化蛹。7月下旬开始羽化,8月中旬为盛期。产卵 Soybean bore worms are the hardest pests in the northeastern soybean producing areas. According to the survey, soybean worm food grain rate is generally 15 to 20%, severe year up to 60 to 70%. The economic loss it causes accounts for about 30% of the total soybean output. First, the occurrence of laws and conditions Soybean borer occurs a generation each year. To mature larvae in the soil cocoon wintering. The second year in July, late cocoon, moved to the surface layer of cocoon pupation. Emergence in late July, mid-August for the peak. spawning